John hollandJohn Holland

Safe, secure, future-focused water storage.

Chaffey Dam Safety Upgrade and Augmentation

Completed in 2016, the upgrade of the regional Chaffey Dam near Tamworth involved raising the existing dam wall by eight metres and the mouth of the ‘morning glory’ spillway by 6.5 metres, increasing storage capacity from 62,000 to 100,500 megalitres.

The downstream embankment was also strengthened, and an auxiliary spillway constructed to enable the dam to safely pass rare and extreme floods.

  • Customer
  • Location
    New England, New South Wales
  • Specialisation
    Water & wastewater
  • Start
  • End
8.0 - MGS from upstream.jpg


John Holland pays respect to the Traditional Owners and Custodiams of the land on which we work and live, and their connections to land, sea and community. We pay our respect to their Elders past and present and extend that respect to all First Nations peoples today.